The Washington Post reports on a new study of trends in premarital intercourse over the past half-century. The study, based on a 2002 survey of about 12,500 men and women, found that 97 percent of people who were no longer virgins at age 44 had sexual intercourse for the first time before they married. By age 20, only 12 percent of people interviewed had married, but 77 percent had sex, and 75 percent had sex before marriage. By age 44, 99 percent of people were no longer virgins, 95 percent reported having had premarital intercourse, and 85 percent had married at some point.